GB177512A - Improvements in or relating to switching mechanism for use in telephone or like systems - Google Patents

Improvements in or relating to switching mechanism for use in telephone or like systems

Info

Publication number
GB177512A
GB177512A GB7842/22A GB784222A GB177512A GB 177512 A GB177512 A GB 177512A GB 7842/22 A GB7842/22 A GB 7842/22A GB 784222 A GB784222 A GB 784222A GB 177512 A GB177512 A GB 177512A
Authority
GB
United Kingdom
Prior art keywords
switch
vertical
detent
rotary
teeth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7842/22A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Publication of GB177512A publication Critical patent/GB177512A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/14—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
    • H01H67/16—Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches

Landscapes

  • Telephone Set Structure (AREA)

Abstract

177,512. Automatic Telephone Manufacturing Co., Ltd., (Assignees of Erickson, J.). March 28, 1921, [Convention date]. Selectors.-In an automatic switch of the Strowger type, a bracket member (shown separately in Fig. 3) formed of cold rolled steel, carries the off-normal springs 135, the interrupter springs 120 of the rotary magnet and such other parts as the lug 140 carrying the rotary-pawl guide 119, the stationary detent 125 and the stop 138 for the vertical pawl, and is arranged to act as a reinforcement to the main casting of the switch. The vertical ratchet teeth 110, Fig. 2, are provided at one side with a second set of teeth 111 offset from the first. These additional teeth are engaged by the vertical detent 108 during the vertical movement of the switch, whilst at the first rotary step they are moved clear of the detent, thus avoiding the necessity for the slight lifting of the switch shaft which usually accompanies this step.
GB7842/22A 1921-03-28 1922-03-17 Improvements in or relating to switching mechanism for use in telephone or like systems Expired GB177512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US177512XA 1921-03-28 1921-03-28

Publications (1)

Publication Number Publication Date
GB177512A true GB177512A (en) 1923-03-15

Family

ID=21784337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7842/22A Expired GB177512A (en) 1921-03-28 1922-03-17 Improvements in or relating to switching mechanism for use in telephone or like systems

Country Status (1)

Country Link
GB (1) GB177512A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033525A (en) * 1997-10-30 2000-03-07 Moffett; Robert Harvey Modified cationic starch composition for removing particles from aqueous dispersions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033525A (en) * 1997-10-30 2000-03-07 Moffett; Robert Harvey Modified cationic starch composition for removing particles from aqueous dispersions

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